2004 1500HD Cummins Swap

[Dchamber]

So I got a customer that wanted me to put a 12v Cummins in his 04 chevy with a 6.0l and 4L80e. I like money so I said yes. Sometime regret it but its coming along kinda nicely. Started in December and Here is what is done so far and what is planned. Any input is helpful. Decided to start a thread as its getting closer and the real headaches will begin as far as wiring and such. Plan to use a stand alone trans ecm. Have not decided on which one so any real life experiences will be appreciated. Been looking at US Shift and COMPUSHIFT. So here it goes!!